720708047 has 4 divisors (see below), whose sum is σ = 763102656. Its totient is φ = 678313440.

The previous prime is 720708031. The next prime is 720708067. The reversal of 720708047 is 740807027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720708047 - 2⁴ = 720708031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720707998 and 720708016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720708017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21197279 + ... + 21197312.

It is an arithmetic number, because the mean of its divisors is an integer number (190775664).

Almost surely, 2^720708047 is an apocalyptic number.

720708047 is a deficient number, since it is larger than the sum of its proper divisors (42394609).

720708047 is a wasteful number, since it uses less digits than its factorization.

720708047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42394608.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 720708047 is about 26846.0061647911. The cubic root of 720708047 is about 896.5746535366.

The spelling of 720708047 in words is "seven hundred twenty million, seven hundred eight thousand, forty-seven".